As long as you are not selling you haven't incurred losses. The market value of your holding might go down along the market, but as long as you are not selling you are not losing anything. The best way to handle losses, is just to take it as a lesson, and learn from it. Never commit the same mistake with the same situation next time.
Such rhetoric works under two conditions. 1) If you believe 100% that the market will not collapse in a panic crash, if something very terrible happens, for example, an attack on 51 bitcoins. 2) If you are ready morally to hold many many months in the most sad version of the development of correction.